Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b47b69af990e7c…

MALICIOUS

PDF

45.2 KB Created: 2020-07-22 15:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a942f38c58d23dd79b749b22e2619468 SHA-1: 031ec29d07ac7692f9c930db4e783250155315f4 SHA-256: 30b47b69af990e7cf52b07b0d2e943d90d965a35a60b2fbe80ef0bcf44ffd0ce
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its intended lure, but the presence of numerous external links strongly suggests a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=coast%20guard%20auxiliary%20vessel%20examiner%20manual
    • http://files.soundnutrition.net/uploads/1/3/0/7/130739396/satige_fufijasi_sunudopilomufu_zenek.pdf
    • http://files.empyreanresearch.org/uploads/1/3/0/7/130738933/vujilematufukevivo.pdf
    • http://files.mhssportsclub.com/uploads/1/3/2/7/132740285/39b6699.pdf
    • http://files.twf-solutions.com/uploads/1/3/1/0/131070973/9012474.pdf
    • https://cdn.shopify.com/s/files/1/0440/6516/1366/files/goveturiwuzifaxubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/67542003314.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/8667215133.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3062/files/bevirilavuxufavufobapum.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/gomijala.pdf
    • https://pezotagufunu.files.wordpress.com/2020/07/34881280872.pdf
    • https://ribekewozepu.files.wordpress.com/2020/06/dugapufinemimoduve.pdf
    • https://tekudoguj.files.wordpress.com/2020/06/40367330789.pdf
    • https://begatipid.files.wordpress.com/2020/07/jiriwenesetibunixinuzo.pdf
    • https://xekevefo.files.wordpress.com/2020/07/21520777856.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/68469798647.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/70094484513.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/38809802552.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/sixubitademo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/gogutiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4388/8023/files/kowikerulipi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/62756040119.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007152.bin
2c8c0194efcb5700cacc4f8095f52c3b32605a9208c1a12cf9ed720f13e8a8c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7152 5280 bytes
font_01_sfnt_off00008339.bin
1ba468b201aa10aff13d9d77d7b6d6316122ee6be110e2e1a86d6a67df2910c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8339 10480 bytes